全文获取类型
收费全文 | 91870篇 |
免费 | 5346篇 |
国内免费 | 1409篇 |
专业分类
耳鼻咽喉 | 1096篇 |
儿科学 | 3373篇 |
妇产科学 | 1701篇 |
基础医学 | 8818篇 |
口腔科学 | 1493篇 |
临床医学 | 6649篇 |
内科学 | 17651篇 |
皮肤病学 | 1345篇 |
神经病学 | 15843篇 |
特种医学 | 2274篇 |
外国民族医学 | 10篇 |
外科学 | 10040篇 |
综合类 | 6231篇 |
现状与发展 | 3篇 |
一般理论 | 6篇 |
预防医学 | 8960篇 |
眼科学 | 1718篇 |
药学 | 6154篇 |
27篇 | |
中国医学 | 2358篇 |
肿瘤学 | 2875篇 |
出版年
2024年 | 165篇 |
2023年 | 1495篇 |
2022年 | 2738篇 |
2021年 | 4108篇 |
2020年 | 3661篇 |
2019年 | 6963篇 |
2018年 | 6128篇 |
2017年 | 4163篇 |
2016年 | 2585篇 |
2015年 | 2606篇 |
2014年 | 5896篇 |
2013年 | 7061篇 |
2012年 | 4831篇 |
2011年 | 4667篇 |
2010年 | 3680篇 |
2009年 | 3310篇 |
2008年 | 3053篇 |
2007年 | 2538篇 |
2006年 | 2029篇 |
2005年 | 1702篇 |
2004年 | 1683篇 |
2003年 | 1440篇 |
2002年 | 1094篇 |
2001年 | 927篇 |
2000年 | 853篇 |
1999年 | 724篇 |
1998年 | 627篇 |
1997年 | 674篇 |
1996年 | 441篇 |
1995年 | 326篇 |
1994年 | 319篇 |
1993年 | 264篇 |
1992年 | 199篇 |
1991年 | 192篇 |
1990年 | 159篇 |
1989年 | 138篇 |
1988年 | 113篇 |
1985年 | 1395篇 |
1984年 | 1778篇 |
1983年 | 1301篇 |
1982年 | 1419篇 |
1981年 | 1339篇 |
1980年 | 1145篇 |
1979年 | 1229篇 |
1978年 | 1117篇 |
1977年 | 784篇 |
1976年 | 967篇 |
1975年 | 866篇 |
1974年 | 753篇 |
1973年 | 790篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
《Foot and Ankle Surgery》2020,26(2):193-197
BackgroundThe aim of this study was to compare the radiographic and functional results between fixation and non-fixation in the Cotton osteotomy for the treatment of adult acquired flatfoot.MethodsA retrospective, case-controlled study of consecutive stage IIB posterior tibial tendon dysfunction (PTTD) patients treated with the same bony reconstructive surgery including cotton osteotomy between 2013 and 2017. Meary’s angle, the medial arch sag angle (MASA), and medial cuneiform cobb angle (MCCA) were evaluated pre-operation, at first weight bearing after surgery, and 12 months post operation.ResultsForty feet were included in the study. The cotton osteotomy utilized screw fixation (n = 20) or non-fixation technique (n = 20). No significant differences between groups were found in pre-operative and follow-up radiographic parameters, union rate, and functional results.ConclusionThe non-fixation with press fit technique is a reliable procedure for Cotton osteotomy and as effective as screw fixation.Level of evidenceLevel III, case control study 相似文献
22.
Michelle Moffa Ryan Cronk Donald Fejfar Sarah Dancausse Leslie Acosta Padilla Jamie Bartram 《International journal of hygiene and environmental health》2019,222(3):335-346
Background
There are well-established relationships between health and homelessness, and shelters can facilitate the transmission of diseases and contribute to their prevention. Adequate environmental health conditions and hygiene behaviors in homeless shelters are fundamental to the health of their clients, a marginalized population. We report the status of environmental health conditions and hygiene behaviors in homeless shelters and associated health outcomes; interventions to improve these conditions, behaviors, and outcomes; and obstacles to improvement.Methods
PubMed, Web of Science, Scopus, and EBSCOhost were searched for peer-reviewed studies, and additional sources for grey literature. Studies were included if they reported primary data on one or more environmental health condition or hygiene behavior in homeless shelters.Results
Twenty-eight studies were included in the review. Insufficient ventilation systems, unhygienic bedding, and overcrowding were the most documented environmental health and hygiene deficiencies in homeless shelters, and tuberculosis infections and skin diseases were the most documented associated health outcomes among clients. Studies frequently recommended or described implementation of behavioral and administrative controls, ventilation system improvements, and ultraviolet germicidal irradiation fixtures.Discussion
Most studies addressed airborne transmission of tuberculosis and were conducted in high-income countries, revealing an imbalance in the literature. Insufficient resources and the transience of clients are barriers to improving hygiene behaviors and environmental conditions in homeless shelters. Further investment and research into ensuring adequate hygiene and environmental health in this setting can protect and promote the health and well-being of people experiencing homelessness. 相似文献23.
24.
25.
AimsThe effect of Origanum majorana tea consumption on motor and non-motor symptoms was investigated in patients with idiopathic Parkinson's disease, measured by validated tools.MethodsSixty patients with idiopathic Parkinson's disease and under conventional medication were enrolled voluntarily in the study. All participants were randomized on double-blind to placebo or Origanum majorana. Clinical assessment with validated tools (UPDRSIII, NMSS, and BDI) was done before Origanum majorana or placebo consumption (Day 0) and at the end of the experiment (Day 30).ResultsThe treatment groups were similar at baseline on demographic and clinical variables. During the course of study, nine participants withdrew for reasons of noncompliance and inability to follow-up. Fifty-one participants completed the study. Upon completion of 30 days of treatment, Origanum majorana tea consumption did not decrease the UPDRSIII score ([UPDRSIII] D0 = 18.76 ± 8.58, D30 = 16.52 ± 7.96, p = 0.069) at the p value was 0.07. However, a statistically significant improvement was noted in NMSS and BDI scores (p < 0.0001 and p < 0.0001, respectively). Assessment of the UPDRSIII, NMSS and BDI scores of the patients did not reflect any improvement with placebo. No side effect was detected during the study.ConclusionThese findings show improvement of depressive and non-motor signs in patients with Parkinson's disease in the group that consumed Origanum majorana tea in combination with conventional therapy. Improvement of motor signs may need an extended treatment period. However, more research with a large number of participants and lasting longer than 1 month is needed to argue these findings. 相似文献
26.
27.
28.
《Clinical neurophysiology》2020,131(7):1444-1452
ObjectiveTo investigate cognitive functions in non-demented patients with early-onset Parkinson's disease (PD), and to compare PARK2 gene mutation carriers and non-carriers by means of event-related brain potentials (ERPs).MethodsThe participants comprised patients with early-onset PD (EOPD) and healthy controls (HC). Patients with EOPD were divided into two groups as carriers of known pathogenic variants of PARK2 gene (EOPD-PC) and non-carriers of genes involved in familial PD (EOPD-NC). ERP data were collected during auditory oddball and visual continuous performance test (CPT).ResultsBoth EOPD groups (EOPD-PC and EOPD-NC) displayed reduced and delayed P3 in response to oddball target and CPT NoGo. CPT Go P3 was reduced in EOPD-NC but not in EOPD-PC. Oddball target N1 was reduced and P2 was enhanced in both EOPD-PC and EOPD-NC. In both cognitive tasks, RTs were prolonged and accuracy was lower in EOPD-PC and EOPD-NC.ConclusionsWe found several EOPD-related neurophysiologic changes, implying impairments in cognitive functions. Pairwise comparisons between EOPD-PC and EOPD-NC revealed no significant ERP marker.SignificanceIn this study, the confounding effect of normative aging was somewhat excluded compared with many previous studies. In contrast with the many oddball studies in non-demented PD, we clearly observed reduced and prolonged P3 in early-onset PD. Our NoGo P3 findings also contribute to the limited ERP research concerning response inhibition. 相似文献
29.
30.